NL Notes: Shields, Guerrero, Marlins

James Shields is already providing value to the Padres, Dennis Lin of the San Diego Union-Tribune writes. “Having him in here is going to be super valuable for this pitching staff,” says Tyson Ross. Shields has impressed the Padres with his attitude and his preparation — he’s already showed many of his teammates his personal book of scouting charts on opposing players. Ross and Robbie Erlin add that they’re looking forward to watching Shields work to see how he stays so durable — Shields has pitched over 200 innings in eight straight seasons, and as Lin notes, Ian Kennedy is the only other Padres starter who’s reached the 200-inning threshold. Here’s more from the National League.

Infielder Alex Guerrero is facing a crucial year in Dodgers camp, MLB.com’s Jesse Sanchez writes. Guerrero, who’s now in the second year of a four-year deal, cannot be optioned to the minors this season without his permission, so if the Dodgers don’t find space for him on their active roster, they’ll have to to trade or release him. “I don’t want to go down. I’m not going down,” Guerrero says. “I feel like I can get better here at this level and play every day. I think that’s what every player wants.” Guerrero, 28, hit well at Triple-A last season even given the offense-heavy environment at Albuquerque, batting .329/.364/.613 in 258 plate appearances. The Dodgers have a crowded middle infield, however, with Justin Turner and Darwin Barney also available to back up Howie Kendrick at second base, and there are questions about Guerrero’s defense.